16
AGL_Unit_ZX_Small_E_Rev03
For charge adjustment it is recommended to check the liquid sight glass just before the expansion
valve.
Figure 14: Service valves and Schraeder valves for refrigerant/oil charging
NOTE: Once charging is done, the type and amount of refrigerant used must be clearly
noted on the unit nameplate.
NOTE:
In order to meet the requirements of the Ecodesign Directive 2009/125/EC with regard
to efficient system operation, ensure the refrigerant charge is sufficient.
4.2.2
Oil charging procedure
Copeland ZX Small refrigeration units are supplied with a compressor oil charge only. After
commissioning, the oil level should be checked and topped up as necessary.
NOTE: The oil level should be approximately halfway up the sight glass.
As mentioned in paragraph 2.6.1 "Qualified refrigerants and oils", Emerson recommends using one
of the following oil types:
▪
Emkarate RL 32 3MAF
▪
Mobil EAL Arctic 22 CC
Charging is done through the Schraeder valve located on the suction valve
– see
Figure 14
above.
4.3 Rotation direction of scroll compressors
Scroll compressors, like several other types of compressors, will only compress in one rotational
direction. Direction of rotation is not an issue with single-phase compressors since they will always
start and run in the right direction.
4.4 Maximum compressor cycle
Maximum permitted starts per hour: 10.
Service valves
Schraeder valves
